Apex domains cannot have CNAME records.
Question and response
Question
dig 3d-packshop.com. NS
Answer
3d-packshop.com. 5 NS ns-388.awsdns-48.com.
3d-packshop.com. 5 NS ns-475.awsdns-59.com.
3d-packshop.com. 5 NS ns-842.awsdns-41.net.
3d-packshop.com. 5 NS ns-1610.awsdns-09.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0